Hello everyone,
I have a quick question
I shot a whole 120 roll of Fuji Provia 100F slide film today with my Hasselblad 503cw and 80mm CFE lens, I forgot to change the asa Dial to 100 on my Hasselblad, instead I shot all pictures at 400.
But All shots was metered correct with handheld light meter at 100 asa.
If you used a handheld meter at ISO 100, and used the exposures your meter recommended, then you didn't really shoot at ISO 400, you shot at ISO 100. Everything will be fine.
The ASA dial on the hasselblad 500 series bodies only matter with TTL OTF Flash metering, where the camera is part of the flash circuit.
You would get underexposure had you been using a TTL flash with the camera
As long as your ambient light meter (whether it be a metered hasselblad prism which has its own ASA/ISO dial, or an external meter) is set to the desired ASA/ISO/EI, you're good to go. Sorry for the confusion